16). Volume of a cube: v = s³ (s) stands for side length
v = 3³
v = 3 × 3
v = 9
You were right, the answer is a.
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I drew a picture to figure out this problem. I drew a circle with 16 different sections. Half of them were black and the other half were white. If a dart is thrown 3 times and lands on the black each time, then you have to eliminate the 3 times. So on the picture, eliminate 3 black blocks. The question wants to know the probability of the dart landing on a black if it's thrown a fourth time. In order to find this out, you need to eliminate just one more black section. Then, you have four more black sections left. You have to put 4 over the number of total black sections there were, which are 8. 4/8 = 1/2, so the final answer is 50%. Sorry if this is confusing.
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